Liang Xiao Lili Huang Zhihui Wei Comments on "Staircase effect alleviation by coupling gradient fidelity term". 1569-1574 2010 28 Image Vision Comput. 11 http://dx.doi.org/10.1016/j.imavis.2010.01.010 db/journals/ivc/ivc28.html#XiaoHW10a